Supervision of master theses based on Scrum: A case study     

Tomás  Gonçalo  Mira da Silva  Miguel  Bidarra  José 《Education and Information Technologies》2021,26(4):3721-3741

Education and Information Technologies - The success rate of a master program on Information Systems and Computer Engineering (MEIC) in a Portuguese university is very unsatisfactory, showing that...  相似文献   

Evaluating a digital library self-archiving service: The BDBComp user case study     

Lena Veiga e Silva  Marcos André Gonçalves  Alberto H.F. Laender 《Information processing & management》2007

In this article, we present an overview of a self-archiving service for the Brazilian Digital Library of Computing (BDBComp) and describe a user experiment conducted to evaluate it. This experiment involved several potential real users, including computer science graduate students and professors, and archivists/librarians. The results of this study and their implications for similar services are described and analyzed, following sound statistical principles, which can serve as a basis for other similar studies. These results and their analysis indicate that we have successed in building a usable, efficient and learnable self-archiving service, properties which are essential to bring users to the system.  相似文献   

Using matrix norms to estimate the direction of arrival of planar waves on an ULA     

Rodrigo P. Lemos  Jonas A. Kunzler  Diego F. Burgos B.  Mário J. de Souza  Hugo V. L. e Silva  Yroá R. Ferreira  Edna L. Flôres  Oliver Sander 《Journal of The Franklin Institute》2019,356(6):3781-3796

SEAD method estimates the direction-of-arrival angles on an uniformly linear array based on the difference between the two largest singular values, what is called differential spectrum. Although it presented an outstanding performance, the ability to indicate the source positions was not elucidated yet. Inspired by the differential spectrum formulation we derived a total differential spectrum and found out that the matrix norm induced by the vector 2-norm of a modified spatial covariance matrix can be used to estimate the direction-of-arrival of multiple plane waves. Indeed we show that matrix norms are estimators and we propose their use instead of the singular value decomposition in SEAD-based methods. We present a general mathematical expression in order to explicit the operating principles of the proposed methods. Consequently, we were able to explain how the relation between the arriving and the search angles produces the larger peaks on the differential spectrum. To evaluate the important role played by matrix norms, a thousand experiments were carried out. They showed that the proposed approach proved to be as accurate as the previous SEAD-based methods, while providing a significant reduction on runtime. It also outperformed well-established methods like MODEX regarding the estimation error.  相似文献   

Zoological Collections and Collecting in Cuba During the Twentieth Century     

Gilberto Silva Taboada 《Curator: The Museum Journal》1994,37(2):90-98

Relevant events in the history of twentieth-century zoological collection in Cuba and the institutions involved are traced here in order to document the present whereabouts of Cuba's zoological collections. The historical accounts are divided into two periods: from the founding of the republic in 1902 to the revolutionary victory of 1959, and from 1959 to the present. A preliminary survey of the nature, size, and current state of these collections is included.  相似文献   

Effects of detraining in age-group swimmers performance,energetics and kinematics     

Rodrigo Zacca  Argyris Toubekis  Laura Freitas  Ana Filipa Silva  Rui Azevedo  João Paulo Vilas-Boas 《Journal of sports sciences》2019,37(13):1490-1498

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The impact of exercise training on the lipid peroxidation metabolomic profile and respiratory infection risk in older adults     

Diana Silva  Eduardo Arend  Silvia M. Rocha  Alisa Rudnitskaya  Luís Delgado  André Moreira 《European Journal of Sport Science》2019,19(3):384-393

Aging is associated with oxidative stress that may increase susceptibility to respiratory infections (RIs). We aimed to assess the impact of exercise training on the risk of RIs in older adults and on a targeted metabolomic profile of stress oxidative lipid peroxidation-related metabolites. Methods: In an 8-month clinical trial, 38 participants over 60 years of age were allocated to an exercise group (EG), in which participants underwent 90-min training sessions three times/week(n?=?20), or a control group (CG), in which participants maintained daily physical activities(n?=?18). Daily respiratory symptoms and RIs number and severity were collected. Serum by-products were assessed by comprehensive two-dimensional gas chromatography coupled to mass spectrometry with time of flight analyzer. Serum metabolomic profiling comprised 76 metabolites (alcohols, aldehydes, alkanes, and ketones). Principal components analysis and ANOVA-simultaneous component analysis were used to evaluate the metabolomic profile change. Results: The odds ratio of RIs for the EG was 2.0 CI 95% [0.2;25]. The incidence of RIs was 47% [23;70] in the EG vs. 44%[12;77] in the CG. The metabolomic profiling showed that alkanes and aldehydes classes differed between the EG and the CG before and after intervention. A calibration model showed a relation between the metabolites from four main classes (ketones, alcohols, alkanes and aldehydes) and the prediction of the number of RIs. Conclusion: Moderate exercise training, in older adults, compared with no exercise in controls, did not show a difference in the risk of RIs. A pattern of lipid peroxidation was associated with the number of RIs.  相似文献   

Conceiving multiple markets through network analysis: evidence from the emergence of the World Music market     

Glaucia Peres da Silva 《Journal of Cultural Economy》2018,11(3):244-260

The idea of multiple markets, conceptualised as a variety of concrete market configurations, was fruitfully developed in the socio-material networks research programme. However, it has not yet been able to solve the following puzzle: the differentiation and specification of multiple markets that exist at the same time in the same place. In this paper, I argue that White’s model of ‘markets from networks’ can contribute to filling this gap, since it is centred on the specification of a market’s structural and cultural boundaries. His model allows for the analysis of concrete market practices intertwined with more abstract concepts of markets formed in discourses that move firms and markets across different levels – from local markets to market sectors. An in-depth analysis of the emergence of the World Music market demonstrates the advantages of employing this model in the analysis of multiple markets.  相似文献   

Education for freedom: A look at the pedagogy of Freire     

Alberto Silva 《Prospects》1973,3(1):39-45

In the first two issues of Volume II,Prospects published articles written by Latin American educators for the International Commission on the Development of Education.At a time when several countries of that region are undertaking reforms of their educational systems (see Vol. II, No. 4, the article by Augusto Salazar Bondy), Alberto Silva's analysis, through its emphasis on Paulo Freire's educational methods, seems to be appropriate in order to eopen thought and controversy on this line of thinking. Author of L'École hors de l'École: lÉducation des Masses.  相似文献   

Book reviews     

M. Bruce Haslam  Edward T. Silva  Manfred Bayer  Stephen Foster  Neil L. Baumgart  John R. Beech  Samuel Kellams  A. G. Watts  Manzoor Ahmed  Robert Myers  Ronald K. Goodenow 《Higher Education》1977,6(3):383-401

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It Looks a Bit Like This: Prototyping in an Academic Library     

Holt Zaugg  Elise Silva  G. M. Nelson  Cyndee Frasier 《图书馆管理杂志》2020,60(2):197-213

Abstract

Prototyping is an incremental process that facilitates those looking to make changes in products, services, or resources. Originating in industrial fabrication process, prototyping can be adapted by librarians to examine changes made to library services, amenities, and resources. They offer a cost-effective way of trying something new and needed, to ensure that patron needs are met. This article modifies prototyping into a five-step process and reviews five examples where the Lee Library used prototyping to inform library decisions to inform the development of library services, amenities, processes, and resources to better serve its patrons.  相似文献